Evaluation of water control precipitation radar products in rainfall processes of different intensities
ZHAO Zhanfeng
WANG Lin
ZHU Ziwei
SUN Fubao
LIU Wenbin
SUN Chunpeng
TIAN Fuqiang
ZHOU Shou
YANG Fan
QI Youcun
Abstract：Water control precipitation radar enables refined areal rainfall monitoring.It is a core piece of equipment for upgrading hydrological rainfall observation operations and enhancing the capabilities of forecast,early-warning,rehearsal,and contingency planning.The construction of water control precipitation radar is a crucial task for accelerating the establishment of a modern monitoring and forecasting system for rainfall and water conditions.This study selected the Daqing River basin of the Haihe River basin,a plain region,as the pilot area,and systematically evaluated the application of water control precipitation radar and its quantitative precipitation estimation(QPE)products for typical rainfall processes of different intensities monitored during the 2023 and 2024 flood seasons.The research results indicate that the correlation coefficients between the radar QPE products and hourly rainfall from ground-based rain gauge stations were 0.768 and 0.901 for the two typical rainfall processes,respectively.This verifies the high-precision capability of the networked radar and its algorithms in capturing the intensity and location of heavy rainfall.Stratified evaluation based on rainfall intensity showed that the deviation of radar retrieval results tends to increase moderately with higher rainfall intensity.Future efforts require continuous improvement of core algorithms,such as attenuation correction,to further enhance the monitoring accuracy for heavy rainfall.Based on the current construction and application status of water control precipitation radars by various water authorities at different levels,and considering the main advantages and application effectiveness of this technology,recommendations for application planning and construction management are proposed in terms of operational platform development,quality assessment,computing environment,and forecasting models.
Keywords：water control precipitation radarDaqing River basinrainfall of different intensitiespilot applicationrainfall and water conditions monitoring and forecasting systemforecastearly-warningrehearsaland contingency planningquantitative precipitation e
Publication Date：2026-02-28
Online Publishing Date：2026-03-17(First online date of this platform, not the publication date of the document)
Pages：7( 13-19 )